Revoking mechanism for automatic looms



March 21, 1928. 1,663,940

A. A. GORDON ET AL REVOKING MECHANISM FOR AUTOMATIC LOOMS Filed June 17. 1925 4 Sheets-Sheet!- INVENT'Q AL E TA. GQRD N ALFRED F. Mo REEL-L- e N YS March 27, 1928. 1,663,940

A. A. GORDON ET AL VEN I'Oa ALBERT GORDON ALFE ED-= F-T MQRRELL.

. AT TO E YS March 27, 1928. 1,663,940

A. A. GORDON ET AL REVOKING MECHANISM FOR AUTOMATIC 140 9113 Filed Ju'ne 17, 1925 4 Sheets-Sheet 4 INVEN'T'Q'? ALBERT A. Gov-213 o|\l I NFRED FITORRELL.

Patented Mar. 27, 1928.

UNITED STATES ALBERT A. GORDON AND ALFRED F.

MOB-BELL, F

WORCESTER, MASSACHUSETTS,

ASSIGNORS TO CROMIPTON 8a KNOWLES 'LOOM WORKS, OF WORCESTER, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS, 1

REV'OKING MECHANISM FOR AUTOMATICLOOMS.

Application filed June 17, 1926. Serial No. 116,726.

This invention relates to an automatic loom of the pick and pick type, in which a plurality of shuttle boxes are provided at both ends of the lay. It sometimes happens that a shuttle will fail to enter its shuttle box to the full extent, but will come to'rest with one end portion projecting therefrom.

It is the general objectof our invention to provide improvedmeans for revoking the transfer of a weft carrier to the shuttle when the shuttle fails to'box, said means being also effective to disablethe drop box mechanism and prevent shifting movement of the shuttle boxes under the same conditions and to throw off the shipper to stop the loom.

' Our invention further relates to arrange ments and combinations of parts which will be hereinafter described and more particularly pointed out'in the appended claims; I

A preferred form of our invention is shown in the drawings in which Fig. 1 is a'front elevation of portions of a loom embodying our improvements;

Fig. 2 is a left hand side. elevation of the revoking mechanism and certain parts as sociated therewith;

Fig. 3 is a view similar to Fig. 2, but

showing the parts in a diiferentposition;

Fig. 4 is a partial rear view, looking in the direction of the arrow 4 in Fig. 2;

Fig. 5 is a detail planview, taken along the line 5-5 in Fig. 1, and f Fig. 6 is a detail side elevation, looking in the direction of the arrow 6 in Fig. 1.

' Referring tothe drawings, wehave shown portions of a loom'including a loom frame 10, alay 11 supported upon the usual swords 12, a plurality of shuttle boxes 13 rotatably mounted at the magazine end of the 100m, and a magazine indicated generally by the letter M. The rotary huttle boxes are pref erably actuated by a rack and pinion mechanism such as is disclosed inthe prior application of Albert A. Gordon, Serial No. 16,791, filed March 19, 1925, and the racks are shifted verticallyby a lifter rod 15 'having a laterally projecting stud 16 engaged by a give-way device 17 forming the upperend of a link 18 which is pivoted on a crankpin way device 17 comprises a portion 21 intewith the link 18 and a portion 22 (Fig;

19 mounted on a rock shaft 20; The give 6) pivoted at 23 to the portion 21, said parts being drawn together by a tension spring 2 1. WVhen movement of the lifter rod. 15 is prevented, as will be hereinafter described, the give-way device yields and slips idly upward past the stud 16, thus preventing damage to the mechanism.

Transfer mechanism.

The magazine M is provided with a transfer lever 25 having a hook 26 pivoted thereto and adapted to be swung rearward into the path of an actuator 27 having a coopera tive ,hook at its upper end. The hook 26 is moved to operative-position by the action of the bell crank 30 havinga lost motion connection through alink 31 to an arm 32 fixed to a shaft 33 which extends across the breast-beam 34 to the opposite side of the loom, where it is controlled by the weft detecting mechanism in the usual manner.

When substantial exhaustion of weft is indicated, the shaft 33 is rocked, swinging the'bell crank 30 on its pivot and depressing the arm 35 0f the'bell crank against a spring 36 fixed on the front side of the hook 26. The hook 26 is thus moved yieldingly' rearward into the path of the hooked upper end of the actuator 27, which is intermittently reciprocated vertically by suitable actuating mechanism (not shown). I

'When the hook is engaged by the actuator, the transfer lever 25 is drawn downward anda change of weft in the active shuttle is effected. All of the'parts thus far described are of the usual type and in them-' selves form no part of our present invention.

Reooking mechanism. We will now describe'more specifically the mechanism which we have provided for revoking. the'transfer and prevent shifting of the .shuttle boxes when a shuttle fails to.-

box. For thispurpose, a revoking arm 40' of the lay 11 as the lay moves forward. If the shuttle fails to box completely, the projecting end of the shuttle will strike the arm 40, swinging it forward to the position indicated in Fig. 3.

-A link 41 is pivoted at 42 to the arm 40 and is provided with an L-snaped slot 43 which normally receives a stud 44 in its upwardly extending offset end portion 45, as indicated in Fig. 2. The stud 44 is fixed in the side of a lever 46 mounted upon a pivot 47 on the breast-beam 34 and having an upwardly projecting portion 48 adapted to engage a stud 49 projecting laterally from the hook 26.

\Vhen the revoking arm is swung forward by engagement with a misplaced shuttle, the arm'48 of the lever 46 is pushed forward, moving the hook 26 to an inoperative position, as indicated in Fig. 3.

In order to prevent excess movement of the lever 46, the link 41 is provided with a Stud 50 adapted to engage a cam plate 51 secured to the breast-beam 34. When the lever 46 has beenmoved forward sufliciently to accomplish its functions, the stud 50 en gages the fixed cam plate 51 and the link is raised thereby until the stud 44 passes into.

thelongitudinal portion of the slot 43, which permits the link 41 to slip idly past the stud during its continued forward .movement. I

Through the connections thus far described, the revoking arm 40 is effective to prevent actuating movement of the transfer lever 25 in the event of a misplaced shuttle.

We have also provided connections by which the revoking arm 40 is effective to prevent shifting movement of the shuttle boxes. For this purpose, the lever 46 is provided with a depending arm 55 (Fig. 2) having an end portion which normally holds a plunger 56 depressed against the tension of a spring 57. The plunger 56 is connected by .a cord or chain 58 (Fig. 1) toa stud 59 (Fig. 5) fixed in the side of a pivoted lock' 111g member 60, having stop arms 61 and 62 projecting therefrom;

The lifter rod 15 is provided with a lug or offset projection 65 (Fig. l) which normally clears the arms 61 and 62 as the lay moves forward, and the lifter rod is thus free to be shifted vertically. If, however, the arms 61 and 62 are swung from the full line position of Fig. 5 to the dotted line position in said figure, the arms will then be in the path of the lug or offset 65 when an attempt is made to move the lifter rod vertically. The stop arms will thus positively .prevent movement of the lifter rod- The pivoted member 60 is mounted in fixed bearingsl70, which may be supported by a suitable stand 71. V V

A spring 72 is connected to the pivot shaft 7 3 of the member 60 in such a way that it tends to swing the arms 61 and 62 away from path of the projection 65. The spring 72, however, is of less strength than the spring 57 shown in F 2, so that the spring 57 will readily overcome the spring 72 and swing the arms 61 and 62 to operative position when released by the forward movement Resetting mechanism. 7

We have also provided convenient means for resetting the magazine and "the 1nd1cating mechanism after a transfer has been re voked. For this purpose the depending arm 7 55 of the lever 46 engages an upwardly eX- tending arm 75 of a resetting lever 76 mounted upon a fixed pivot 77. The camlike end of the lever 76 is engaged by a stud- 78 on an arm 79'secured to a rock'shaft 80 which extends across the loom and iscon nected to be rocked as the shipper is reset.

When the shaft 80 is thus rocked in the direction of the arrow a in Fig. 3, the stud 78 engages the cam face of the'lever 76, turning the lever76 in a clock-wise direction about its pivot 77 and swingingthe' lever '46 rearward to the initial position shown in Fig. 2. As this-movement'is taking place, the weight of the revoking arm 40 causes the arm 40 and link 41' toralso resume their original positions. I

It is necessary, however, that theplunger 56 be depressed so as to clear the arm 55 of thelever 46 before return movement-of the latter. For this purpose, I provide astud 85 in the side of the plunger 56, which stud is engaged by a depressing lever 86, pivoted at 87 and engaged and depressed by the stud 78 as the shaft .80 is rocked about its axis.

This downward movement of the lever '86 refrom the normal. position 'shown in Fig. 2 to the position of F ig, 3, it engages the stud 78 and rocks the shaft 80 to throw on the shipper and stop. the loom, thus aficrding addi-. protection in the event of a misplaced tional shuttle. ,7

7e have thus provided simpleand effective mechanism by which the operationof the transfer lever 25 and also the operation of the lifter rod 15} isefiectively prevented in the event that the active shuttle fails to enter its shuttle box;

Having thus described our invention and the advantages'thereof, we do not wish to be'otherwise limited to the details herein disclosed'but what we claim is p Y 1. In a weft replenishing loom, a lay, a magazine and a plurality of shifting shuttle boxes atone side of the 100111, and means to revoke the transfer and prevent shifting of the shuttle boxes if the running shuttle en'- gages said revoking means on forward movement of the lay.

2. In a weft replenishing loom, a magazine and a plurality of shifting shuttle boxes I at one side of the loom, and means directly engaged by a misplaced shuttle and effective to revoke the transfer and prevent subsequent shifting of the shuttle boxes.

3. In a weft replenishing loom, a lay, a magazine and a plurality of shifting shuttle boxes at one side of the loom, and a single revoking member positioned for engagement by a misplaced shuttle and connected to revoke the transfer and to prevent shifting of the shuttle boxes if the running shuttle engages said revoking member on for- Ward movement of the lay 4. In a weft replenishing loom, a lay, a magazine and a plurality of shifting shuttle boxes at one side of the loom, an actuating member for said boxes, a give-way device between said actuating member and said boxes,

and means additional to the shuttle effective.

to hold said boxes from shifting movement with said actuating member if the running shuttle engages said revoking member on forward movement of the la-y. v

5. In a weft replenishing loom, a lay, a magazine and aplurality of shifting shuttle boxes at one side of the loom, an actuating member for said boxes, a give-way device between said actuating member and said boxes, a revoking member, and means to hold said boxes from shifting movement with said actuating member if the running shuttle engages said revoking member' on forward movement of the lay, said holding means being controlled by said revoking member which is movable by direct engagement by the'misplaced shuttle. y

6. In a weft replenishing loom, a magazine and a plurality of shifting shuttle boxes at one side of the loom, a locking device for said shifting shuttle boxes, a spring normally acting to move said locking device to operative position, a, stop normally preventing such movement, and shuttle-engaging revoking means effective to displace said stop.

' 7. Ina weft replenishing loom, a magazine and a plurality of shifting shuttle boxes atone side of the loom, a'transfer lever in said magazine, an actuator for said transfer lever,-'a connection between said actuator and said lever movable to operative position upon indication of substantial weft exhaustion, a revoking member, and a connection from said member to said actuating connection, },efi'ective to-displace said connection ment of said revoking member upon engage by a misplaced shuttle.

8.'In a weft replenishing loom, a magazine and a'plurality of shifting shuttle boxes atone side of'the loom, a transfer lever in said magazine, an actuator for said'transfer lever, a connection between said actuator and said lever, means to move said connect1on to operatlve position upon mdlcation of substantial weft exhaustion, and a revoking member by which said actuating connection is positively moved from operative position when said revoking member is engaged by a misplaced shuttle.

9. In a weft replenishing loom, a magazine and a plurality of shifting shuttle boxes at one side of the loom, transfer mechanism for said magazine, actuating means for said transfer mechan1sm,a revoking member, a

connection from said member, effective to disable said actuating means upon forward movement of said revoklng member by engagement with a misplaced shuttle, and

means to disengage said connection from said actuating means during the continued forward movement of said revoking member.

10. In zine and a plurality of shifting shuttle boxes at one side of the loom, transfer mechanism' -movement of said revoking member by a misplaced shuttle. v p

11. In a weft replenishing loom, a magazine and a plurality of shifting shuttle boxes a weft replenishing loom, a magaat one side of the loom transfer mechanism for said magazine, actuating means for said 'transfer'mechanism, a revoking member, a

link connecting said member with said actuating means and having an L-shaped slot therein with an operative and inoperative portion, said actuating means having a stud positioned in said slot and said link being effective to disable said actuating means upon forward movement of said revoking member by a misplaced shuttle, and means to move said link transversely and position said stud in the inoperative portion of said slot upon continued forwardmovement of said revoking member.

12. In a weft replenishing loom, a lay, a

' magazine and a plurality of shifting shuttle boxes at one side of the loom, and means to stop the loom and to revoke the transfer and prevent shifting of the shuttle boxes if the running shuttle engages said revoking means .on forward movement of the lay.

'13. In a Weft replenishing 100m, a magazine and a plurality of shifting shuttle boxes at one side of the loom, and means directly engaged by a misplaced shuttle and effective to stop the loom and to revoke the transfer and prevent subsequent shifting of the shuttle boxes.

, 14. In a Weft replenishingloom, a lay, a magazine and a plurality of shifting shutto stop the loom and to revoke the transfer and to prevent shifting of the shuttle boxes if the runningshuttle engages said revoking member on forward movement of :the lay.

In testimony whereof We have hereunto 2Q ,aifixed our signatures.

ALBERTA. GORDON. ALF-RED F. MORRELL. 

